Hello,
Yes I'm interested, count me in.
Margarita Lopez Martinez
Dept. Geologia, CICESE
Ensenada, Baja California, Mexico
At 12:10 PM 11/29/2005 +0100, you wrote:
>Hi to all
>
>My experience has been the same with Ken, and I am still waiting for parts
>paid last june !
>
>I wonder if all users of Heines's furnaces could put up a groupped order
>(at Thermoshield for example) in order to try to have lower prices for
>heating filaments and crucibles if we order "plenty" of them (I have no
>idea how many "plenty" would mean)...
>
>How does that sound ?
>
>Nick
>
>At 14:18 16/11/2005 -0800, Martin S. Wong wrote:
>>Hi all,
>>Our experience at UC Santa Barbara has been the same with regards to Ken
>>Heine, so we've looked for other resources. We recently had a coiled
>>heater element that sagged and contacted the heat shield, melting part of
>>it. A company called Thermosheild in Palo Alto, CA, was able to provide
>>new furnace sheilding based on our measurements of the Heine furnace
>>design. Although I'm not at Santa Barbara now, reports are that the new
>>heat shielding was of superior design to the Heine version. Contact info
>>for thermoshield is:
>>Thermo Shield
>>722 Orange Avenue
>>Los Altos, CA 94022-3849
>>ph: 650-941-5230
>>fax: 650-941-2568
>>e-mail: [log in to unmask]
>>Main contact: Bernard Scheiff, [log in to unmask]
>>http://www.thermoshld.com/
>>
>>Thermoshield also was able to provide moly tubing for fabrication of moly
>>crucibles. The moly tubing was about $330 from thermoshield for
>>appropriate length and gauge. We had our crucibles fabricated by Applied
>>Fusion (at Andy Calvert's suggestion from USGS in Menlo), which cost
>>another $375 per crucible (so total cost was about $700 per crucible if
>>bought in reasonable numbers and the moly crucibles seem to last longer
>>than the Niobium ones). Their contact info is:
>>Applied Fusion
>>1915 Republic Avenue
>>San Leandro, CA 94577
>>ph: 510-351-8314
>>fax: 510-351-0692
>>[log in to unmask]
>>Ron Musgrove - CEO
>>Ron Holton - VP Fabrication
>>http://www.appliedfusioninc.com/
>>
>>Dave - in response to your question on thermocouples, we had a custom
>>thermocouple made by our physics machine shop which consisted of an Omega
>>unsheathed fine gauged type C thermocouple that comes with a bead at the
>>top (T5R and T3R series). The bare wires can be fed through a standard
>>2-hole ceramic thermocouple insulator, also available from Omega. We then
>>designed a teflon cylinder with a blind hole drilled into the top designed
>>to hold the thermocouple insulator. The blind hole had small holes in
>>either side to feed the thermcouple wires through the blind hole to the
>>outside of the cylinder. The teflon cylinder is slotted at the base to
>>fit into a standard conflat flange electrical feedthrough. We put small
>>set screws into the electrical contacts to attach the thermocouple wires
>>into each feedthrough and covered the teflon base with shrink wrap to
>>avoid having the thermocouple wires touching anything. If the
>>thermocouple breaks, you can just swap out the beaded wire, which is a
>>stock item from Omege for about $60-$80, which is much cheaper than what
>>Heine was charging for repairs and with a faster turnaround time. It
>>sounds a bit more complicated than it actually is. I can have someone
>>take some photos if you are interested.
>>
>>Hope this is helpful.
>>
>>Cheers,
>>Martin
>>
>>--
>>Martin Wong [log in to unmask]
>>Graduate Student www.uweb.ucsb.edu/~mwong
>>Dept. of Geological Sciences Phone: (805)893-2782
>>UC Santa Barbara Fax: (805)893-2314
>>Santa Barbara, CA 93106
>>
>>Current contact info:
>>Visiting Assistant Professor
>>Department of Geology Colgate University 13 Oak Drive Hamilton, NY 13346
>>
>>Ph 315/228-7203 Fax 315/228-7187 [log in to unmask]
>
>
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